变裂缝导流能力下水力压裂整体优化设计方法

OVERALL OPTIMIZING DESIGNATION METHOD FOR HYDRAULIC FRACTURING UNDER VARIABLE FRACTURE DIVERTING CAPACITY

就油田开发过程中水力裂缝导流能力不断降低这一特点 ,提出了注水开发的低渗透油田变裂缝导流能力下水力压裂整体优化设计的新方法。该方法以注采井组为研究对象 ,建立了新的经济模型 ,考虑了压、注、采的费用或收益 ,并应用模拟退火算法优化缝长和裂缝导流能力。计算结果表明 ,提高裂缝初始导流能力也是提高低渗透油田压裂效果的基础。

Focusing on the decrease of hydraulic fracture diverting capacity during the development process, this paper proposes a new method for hydraulic fracturing overall optimizing designation under variable fracture diverting capacity in waterflooded low permeable oil fields. This method takes injection production patterns as its objects, constructs a new economic model with the attention on the cost and benefit of fracturing, injection and production, and optimizes the fracture length and fracture diverting capacity using simulated anneal algorithm. The result shows that increasing the initial diverting capacity of fractures is also the base of improving the fracturing effect in low permeable oil fields.